<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>2-02 圆形circle</title>
</head>
<body>
  <svg width="500" height="500">
    <!--
      cx, cy: 圆心坐标
      r: 半径
    -->
    <circle
      cx="100"
      cy="100"
      r="50"
    >
    </circle>

    <rect
      x="200"
      y="50"
      width="100"
      height="100"
      rx="50"
    />
  </svg>
</body>
</html>